<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Brian, yes it’s polished but only mildly. I still have to finish to 2000 grit, then polish. I only had 1500 grit on hand<div>Hank<br><br><div id="AppleMailSignature" dir="ltr">Sent from my iPhone</div><div dir="ltr"><br>On Oct 16, 2019, at 10:16 AM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><div style="font-family:Arial, sans-serif; font-size:10pt;"><font size="2">Hank, I was checking out your photos from your machining, it was kind of hard for me to figure out exactly how you are doing it but i noticed how clear everything is, you must have had to do some polishing correct? When I was machining my viewports ( the sides) I had to polish to get a clear finish. </font><div><font size="2"><br></font></div><div><font size="2">Did you check into the glass?</font></div><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font><br><span style="font-size: 10pt;">--- <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size: 10pt;">From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size: 10pt;">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span><br><span style="font-size: 10pt;">Subject: [PSUBS-MAILIST] annealing fixture</span><br><span style="font-size: 10pt;">Date: Wed, 16 Oct 2019 11:15:37 +0000 (UTC)</span><br><br><div style="font-size: 13px; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;"><div dir="ltr">Hi All,</div><div dir="ltr">I am trying to determine the best way to support my new dome when I anneal it. I am concerned it will deform because when I did the first heat treatment required prior to machining, the block bent. I deliberately supported the 4 inch thick block at each corner to see how it would react. The bent block is not a problem, in fact it helps me. I need some guidance with this so I don't ruin 50 hours of machining.</div><div dir="ltr">If I can't find the information, I plan to test different ideas with old ports the same thickness in the oven.</div><div dir="ltr">Hank</div></div><span style="font-size: 10pt;">_______________________________________________
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